Holtz eleoteical machine



EDWABD s. RITcHIn or BROOKLINE, MAsscHUsETTs.

Letters Patent Na. 74,139, date d February 4, 1868.

IMPROVBMZENT Innl HoLrz E'LsormcAL MACHINE.

'Llge dgnmle mam tu in 111m Estera atmt aut making ;mi nt tbi same,

TO ALL'PERSONS T 0 WHOM'THESE PRESENTS MAY COME:

Be it known that I, EDWA'ID S. RITCHIE, of Brookline, in the county of Norfolk, and State of Massachusetts,=have invented a new and useful Impro'v'enient in the'Holtz Electrical Majchine' and do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of which-' i Figure 1 is a top view,

Figure2 a side elevation',

Figure 3 a front view,

Figure 4 a rear elevation, and

Figura 5 a Vertical section'of it. The prineiple of my invention or improvement consists in supporting' all the combs and sectors by a glass plate, arranged parallel to the rotary electrizing-disk. Heretofore, it has been customary to support such combs and sectors by 'means of separate insulating-columns of glass or other suitable non-conducting material. My improvement greatly simplifies the 'machine,renders it very stable, convenient of access, and eflicient in operation. The glass plate I also employ as a means of supporting the box of the inner journal of the shaft of the electrizing-disk.

In the drawings, A denotes the base-board of the machine; B, the rotary eleetrizing-disli, the journals of whose shaft,-a, are sustained in boxves or bearings, b c, one of which is upheld by a post or standard, d, and the other by the glass plate c, erected on the base-board A. This glass plate is arranged parallel to the plane of the disk, and, by means of arms or short columns, e e, projecting horizontally from such plate, it gives support to the several sectors D D D, and also, by other arms or applian ces,f, it sustai'ns the several combs E E E E, the whole being arranged as rcpresented in the drawings. Each of the comb-supports trmina'tes, at its rear, in a ball, g, having a hole, z', madelaxially and horizontally in it, such hole being to enable the end of one electric conducting-wire to be inserted within the ball.

The eonductors are used to put any two or moro of the combs in electrical connection with each other and with the dischargers k Z, made, arranged, and applied to the base-board in the ordinary way, such being as exhibited in the drawings.

Each of the sectors is hold to its supporting-arm e by two clamp-nuts, h screwed upon a screw, o, formed on hearm, one of the nuts being on one side of the sector, and the other being on its opposite side. By means of the screw and nLts, the distance of the sector from the rotary disk may be adjusted, as circumstances may require.

`Another advantage of my improvement is that it enables the machine to be readily converted into a Bertcsh machine," in which but one pair of sectors is employed with four of the combs. It also enables the machine to be reduced to that simpler form, viz, that in which but two sectors and two combs are used.

The improvement also enablcs the conductin'g-Wires to be applied to the combs and the dischargers to great advantage, enabling any combination ofthem to be made, as may bedesirable. I

My improvement admits of one pair of combs and one pair of the sectors being easily raised from, and the other being left in connection with, the glass plate. w

I claim the combination and arrangement of the supporting-plate C, of glass o r other equivalent material, with the several sectors, and the combs arranged together and with the rotary electrizing-disk, substantially as speeified.

I also claim the application of the plate C, not only to the several sectors and combs, for giving support to them in their proper relations with one another and the rotary disk, but as a support for one 'of the bearings of the shaft of the rotary disk, the whole being substantially as hereinbefore explained.

n. s. RITCHIE. Witnesscs R. H. EDDY, F. P. HALE, Jr. 

